body{
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "San Francisco", "Microsoft YaHei", 微软雅黑, sans-serif;;
}
body,td,th,dl,dd,ul,ol,h1,h2,h3,h4,h5,h6,p,form,header,section,article,footer,button,input,select,textarea,div,li{margin:0;padding:0;border:0;}
body,button,input,select,textarea{font:12px/1.5 tahoma,sans-serif;background:none;outline:none;}
h1,h2,h3,h4,h5,h6{font-size:100%}
em,b{font-style:normal}
a{text-decoration:none} 
a:hover{text-decoration:underline}
img{border:0;display: block;margin:0;padding: 0;} 